DNA replication I

Question 1

semi conservative method

Answer 1

double stranded DNA is unwound to produce 2 single strands and each parent strand is used to produce a daughter strand

Question 2

what is the only way a DNA strand can be extended

Answer 2

by adding nucleotides to the 3’ OH end

Question 3

” dna is semi discontinuous” explanation

Answer 3

leading strand- made continuously, primer extended by DNA polymerase from left to right
lagging strand

Question 4

what is dna replication primed by

Answer 4

RNA

Question 5

does RNA synthesis need a primer

Answer 5

no

Question 6

okazaki fragment

Answer 6

short, newly synthesized DNA sequences that are created on the lagging strand during DNA replication.

Question 7

what closes the nicks in the DNA backbone between okazaki fragments

Answer 7

DNA ligase

Question 8

replication fork

Answer 8

the point at which the double streamed DNA is unwound by the helicase enzyme

Question 9

is DNA replication bidirectional + explanation

Answer 9

YES
leading strand synthesised continuously, lagging strand synthesised discontinuously in a series of okazaki fragments